Uncommon Occurrence of Pulmonary Aspergillosis Caused by Aspergillus sydowii: A Case Report.

This case report presents an unusual occurrence of pulmonary aspergillosis caused by in a 26-year-old male patient. The patient is from Nepal and had no significant medical history and was previously in good health. Chest computed tomography (CT) scans revealed localized bronchiectasis primarily in the left inferior lingular segment and the left lower lobe. Subsequently, bronchial lavage fluid was collected, and a comprehensive culture examination was conducted to confirm the cause of the infection. While typically predominates as the cause of pulmonary aspergillosis, our bronchial lavage fluid culture revealed the presence of a filamentous fungus, identified as through molecular analysis. Thus, we conclusively identified this particular strain of fungus as the etiological factor behind the patient's condition. Notably, pulmonary aspergillosis due to is exceedingly rare, and we present this case alongside relevant prior data for comprehensive clinical insight. This case underscores the clinical significance of as a fungal pathogen, emphasizing the importance of early recognition and managing fungal infections.